- Posts: 3
- Thank you received: 0
Shaft drive gear ratio change
- dxhemen
- Topic Author
- Offline
- User
I want to lower my freeway RPM for more comfy cruising.
At 75 mph it is in the high 3800-4000 range and too noisy.
I have the 130/90 tire also.
Would anyone have any ideas.
Thank you,
David H
Please Log in or Create an account to join the conversation.
- OKC_Kent
- Offline
- User
- Posts: 1718
- Thank you received: 20
The easiest way would be to install a taller tire, but you won't gain much rpm drop. What is noisy, exactly? Engine noise, or exhaust?
Oklahoma City, OK
78 KZ650 B2 82,000+ miles
Please Log in or Create an account to join the conversation.
- Bluemeanie
- Offline
- User
- Posts: 2519
- Thank you received: 14
I want to lower my freeway RPM for more comfy cruising.
At 75 mph it is in the high 3800-4000 range and too noisy.
I'm pretty sure there are no existing gear swaps for shaft drive. But I don't understand what is so noisy? My KZ650 is doing almost 6500 rpm at 75 and you want to talk buzzy!! I would think 3800-4000 rpm would be pretty nice on the freeway. I'd be happy with 5000 rpm at 70!
1980 KZ650F1, Bought new out the door for $2,162.98!
Please Log in or Create an account to join the conversation.
- Old Man Rock
- Offline
- User
- Posts: 6224
- Thank you received: 225
In my setup, 5th gear at 75mph is spot on at 5500rpm...
Not complaining for my engine build with 15/37 sprocket combo is where I want my power band... Mid range!
Seems at cruising rpm yours has, should be just right. Shaft noise or exhaust?
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Please Log in or Create an account to join the conversation.
- T_Dub
- Offline
- User
- Posts: 1454
- Thank you received: 25
1977 KZ650B1
-810cc
-Cavanaugh Racing Head
-Mikuni RS34's
-GPR Muffler
Please Log in or Create an account to join the conversation.
- otakar
- Offline
- User
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Please Log in or Create an account to join the conversation.
- otakar
- Offline
- User
www.gearingcommander.com/
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Please Log in or Create an account to join the conversation.
- Old Man Rock
- Offline
- User
- Posts: 6224
- Thank you received: 225
Possibly with some different cams may be able to shift the rpm ranges a little but.... to what effect, probably not much...
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Please Log in or Create an account to join the conversation.
- PLUMMEN
- Offline
- User
- Posts: 8139
- Thank you received: 104
ill let the engineer types figure the exact numbers! :laugh:
Still recovering,some days are better than others.
Please Log in or Create an account to join the conversation.
- KZ1100 Bully
- Offline
- User
- Posts: 98
- Thank you received: 0
1983 Kawasaki KZ1100 Spectre D2
Please Log in or Create an account to join the conversation.
- dxhemen
- Topic Author
- Offline
- User
- Posts: 3
- Thank you received: 0
I appreciate the info. It sounds like 3800-4000 isn't too bad by some other folks out there.
My main complaint was the buzz through the bars and grips, which are old hard originals. I should probably try some new ones.
Thanks again.
David H
Please Log in or Create an account to join the conversation.
- dxhemen
- Topic Author
- Offline
- User
- Posts: 3
- Thank you received: 0
I must be too used to autos at 2000 at 75mph.
It was really the handle bar buzz making me numb.
Some new grips may help.
Thanks again.
DH
Please Log in or Create an account to join the conversation.